Percolator.



No. 879,096. PATENTED FEB. 11, 1908.

J. GAUNT. PERCOLATOR.

APPLIUATIOI FILED JAI. '1, 1907.

WJTNESSES g MMM.. @2m I Q @W ATTORNEY.

UNITED sTATEs PATENT oEEIcE.

JHN GAUNT, oF MERIDEN,

CONNECTICUT, ASSIGNOR OF ONE-HALF'TO WILLIAM M. PRISK, OF YALESVILLE, CONNECTICUT.

PERCOLATOR.

To all 'whom it may concern:

Be it known that I, JOHN GAUNT, a citizen of the United States, anda resident of Meriden, in the county of New Haven andfState of Connecticut, have invented a new and Improved Percolator, of which the following is a specification.

My invention relates to the class of devices for preparing coffee or the like for drinking purposes, and the object of my invention is to provide a device of this class in which a minimum amount of heat shall be required in theoperation of the device; and a further ob- .ect of the invention is to rovide means for maintaining the li uid at t e proper tem er- 'ature to produce t e best results; and a urther object of the invention is to provide vmeans for relievin the pressure from within the receptacle; an a further object is to roprovide means for maintainin the hand e of the cover at a temperature w ich w'ill allow Ait to be readily grasped by the hand. VA. form of device in the use of-which these objects may be attained is illustrated in the accompanying drawings-in which v Flgure 1 is a view partially in central section of a device embody-ing my invention. F ig. 2 is a bottom view of the insulating shell, the dotted lines representing the, outer and inner walls of the pot. Fig. 3 is a view of the lower portion of a pot showing theapplication of 1e invention to a structure of a different form from that shown in Fig. 1. Fig. 4 is a bottom view of the insulatinor shell used with the form of ot shown in Fig. 3.

Figs. 5 and 6 are detal views showing the means for retaining the insulating shell in position.

` construction.

In the accom'panyin(r drawin s the letter a 4denotes a coffee, tea ortlike pot aving a handle l), and spout c, of any ordinary form and The numeral 5 denotes an insulating shell located within the pot near the bottom. A heating chamber 6 1sformed at the center o f this shell, and passages 7 extend vfrom the heating chamber to the periphery '-of the shell. The shell is fitted just loosely enough within the ot that a roper amount i' These passages 7 are formed preferabyv by' indenting the metal constituting theshel i of liuid may flow ownward om the chamber between the'peri hery of the shell and the inner surface of t e ot to supply the heating chamber 6 throug the passa es 7.

tube e extends upward through the shell,

Patented Feb. 11, 1908.

communicating 'at its lower end With the heating chamber 6, and this tube supports a basket f inwhich the coffee, or.y tea is placed; This tube and basket are of ordinary form and construction common to devices of this class.

The basket f is supported on a sleeve 8 which fits upon the upper end of the tube e and rests against a stop 9 thereon. Perfora tions 10 are formed through the sleevey 8, 65

these perforations opening under a hood 11 having walls sloping downward. from the center to the periphery.

The upper end of the pot has a shouldered,

annular recess 12 on which the cover 13 rests. 70

At the back of the recess 12 ali 14 projects inward sufficiently to overlie t e rim 15 of'.

the cover.

The cover 13 is preferably composed of lass. This is dome-shaped, havi mg 21 at the highest point throug which a clamp piece extends. flange 22 resting a ainst the inner surface of the cover, and a t readed stem 16 itting'a threaded opening in the handle or knob 1'7. 80

This knob contains a chamber 18l through the wall of which o enings 19 are formed. A washer 20 of rublier er like yielding material is located between the flange and the under surface of the cover. passage is formed from within the cover to the outer surface thereof, through which pressure from within the ot is relieved.

A flange 24 extends a out the inner periphery of the pot and outward therefrom 90 cure yin position. The ange 24 affords additional means for insulating the chamber d from such excessive heat as to cause the contentstherein to boil, and the o enin s 25 provide means through which the i ui con- 105 ents of the chamber d may pass to t Ie cham- It is essential that the li uidcontents of the chamber d be. kept be ow the boilin point, for if it shallreach a higher degree o 11 an open- This clamp piece has a f By this construction a g5 e insu 'ating shell near the 95 osition shown in Fi 1 it is locked se- 100 temperature it is necessary gto provide. vent openings from the chamber d to relieve the pressure caused by the higher temperature of the liquid, and this allows the aroma of the coffee. to esca e. In constructing a device as herein descri ed the liquid contents of the chamber d are effectually kept below the boiling point.

In the o eration of the device the insulating shel 5 revents the liquid within the chamber d om reaching the boiling point. The comparatively shallow passages 7, however, extending from the perlphery of the shell to the heating chamber 6 conducts a thin volume of the liquid to the heating chamber, and the flame coming in contact with the outer surface of the pot directly underneath the passages 7 quickly heats this thin volume ofliquid so that by the time it reaches the chamber 6 it is practically at the boiling point. This enables the liquid to quickly reach the boiling point within the chamber 6 from which it is forced by pressure upward through the tube e in the usual manner, where it is ejected through the openings 10 underneath the hoodV 11 which directs the liquid downward into the coffee or like material located 'in the basket f In the form of the device shown in Fig. 3, the pot has a depressed portion 30 common to tea pots, and the passages 31 in this form of the structure are made by indenting the side walls of the insulating shell 32, as plainly shown in Fig. 4 of the drawings. In this form of the structure the thin volume of liquid passing down through the passages 31 is heated to a considerable degree before it reaches the heating chamber 32, the quantity of liquid in contact with that part of the bottom of the pot between the insulating shell 33 and the inner wali ofthe pot being so thin as to prevent the liquid within the chamber 34 from becoming heated to the boiling point. In fact, a blaze sufficient to extend u 3(1)) will' be sufiicient to quickly heat the liquid in the heating chamber 32 to the proper degrWhile I have shown and described herein passages for liquid formed in the insulating shell, yet it is obvious that these passages may be otherwise formed by stamping out a ortion of the structure other than that orming the shell.

What I claim as my invention and desire to secure by Letters Patent, is

1. A receptacle, an insulating shell located in the bottom of the receptacle and forming a heating chamber at the center of the shell, passages partially formed by the walls of the shell and extending along the surface thereof from the periphery to said heating chamber, a tube extending 'upward from said chamber, and a basket supported on said tube.

2. A receptacle, an insulating shell located the inclined sides of the depressed portiony at the bottom of the receptacle and forming a chamber at the center of said shell, passages partially formed by indentations extending along the surface of the walls of said shell to said chamber, a tube extending from said chamber upward, andl a basket supported by said tube.

3. A receptacle, an insulating shell located at the bottom of the receptacle and forming a heating chamber at the center of the shell, shallow passages formed partially by the walls of the shell and partially by said receptacle and extending along the surface of the walls to said heating chamber, a tube extending upward from said chamber, and a basket supported onsaid tube.

4. A receptacle, an insulating shell located in the bottom of the receptacle and forming a heating chamber at the center of said shell, passages partially formed by the walls of said shell and extending radially along the surface of the wall into said heating chamber, a tube extending upward from said chamber, and a basket supported on said i tube.

5. A receptacle, an insulating shell located in the bottom of the receptacle and forming a heating chamber at the center thereof, passages partially formed by said shell and extending along the surface of the bottom wall of the shell to said heating chamber, a tube extending upward from said heating chamber, a sleeve telescoped on the upper end of the tube, a' basket supported by said sleeve, a mush-room shaped hood at the end of the sleeve, and perforations through the wall of the sleeve underneath said hood.

6. A cover for a receptacle for heating purposes composed of glass of dome-shape with a central opening, a clamp having a flange locatedwithin the cover and ahollow threaded stem projecting through said opening, and a handle fitting said threaded stern and having a chamber with openings therefrom to the outer surface of the handle.

7. A cover for a receptacle for heating purposes composed of glass of dome-shape with a central opening, a clamp having a flange located within the cover and a hollow threaded stem projecting throu h said opening, a washer of flexible material ocated between said Harige and the inner surface of the cover, and a handlefitting said threaded stem and lhaving a chamber with openings extending from said chamber to the outer surface of the handle.

8. A receptacle, a flange projecting from the inner surface of the receptacle, an insulating shell located at the bottom of the receptacle and held in place by said flange, said shell having a heating chamber in its under surface, passages extending from the periphery of said shell to the heating chamber, a tube extending upward from saidchamber, and auba sket' supported on said tube.

9.. A receptacle, a ange projecting from .of said shell to the heating chamber, a. tube the lnner surface of the receptacle and pro-` extending from said chamber, and a basket vided with openings, an insulating shell supported on said tube.

arranged to underlie the ange and havin JOHN GAUNT. lips to pass through said openings, said she Witnesses: f' having a heating chamber in its under sur- T. HENRY PmSK,

face, passages extending from the periphery EDWIN S. MAY. 

